Preview:
<!DOCTYPE html>  
<html>  
<head>  
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js">  
 </script>  
 <script type="text/javascript" language="javascript">  
 $(document).ready(function() {  
 $("h1").css("color", "red");  
 });  
 </script>  
 </head>  
<body>  
<h1>This is first paragraph.</h1>  
<p>This is second paragraph.</p>  
<p>This is third paragraph.</p>  
</body>  
</html>
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